Electrically-operated sound-producer.



C..J. SCHWARZE.

ELECTRICALLY OPERATED SOUND PRODUCER.

APPLICATION FILED MAY 29. 1914.

Patented Apr. 25, 1916.

WITNESSES: llW/E/VTOI? W 4 Car] Jficizwarze jag/4m I W Mt-$20M CARL J. SCHWARZE, 0F ADRIAN, MICHIGAN, ASSIGNOR T0 SCHWARZE ELECTRIC CUIWPANI, OF ADRIAN, MICHIGAN, A CORPORATION OF MICHIGAN.

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Patented Apr. 25, rate.

. Application filed ma 29,1914. Serial No. MUM-1.

To all whom it may concern:

Be it known that T, CARL J. SOHWARZE, a citizenyof the United States of America, re siding at Adrian, in the county of Lenawee and State of Michigan, have invented certain new .and useful Improvements in Electrically-Operated Sound-Producers, of which the-following is a specification, reference being had therein to the accompanying drawings. I I

The invention relates to electrically operated sound producers more particularly designed for use on vehicles, and the invent on consists in certain features of construction as hereinafter set forth. I

,lln'the drawings: Figure 1 is a perspective view. Fig. 2 is an end elevation'wlth the cap removed; Fig. 3 is a longitudinal section through the sound producer; Fig. 4 is a plan View of a portion of the sound producing diaphragm showing the reinforcement therefor; and Fig. is a section on line w a2 Fig. 4..

y ducers' of that type in which a vibratory diaphragm is actuated by a striker, WhlCh n turn. is reciprocated by electromagnetic means. The sound produced is intensified by a resilient bufier which is opposed to the resilient diaphragm, and i in connection therewith has the efi'ectof increasing thethemovement of the armature operates these contacts to open the circuit. To 'form a amplitude of vibration of the striker;

It is one of the objects ofthe invention to overcome a defect in constructions heretofore used, viz., the cracking of the dia phragm at the point of contact of the striker thereon. It has been found that these diaphragms very frequently develop radiallyextending checks-which start from the point of impact, so as to interfere with the roper vibration and the quality of soun produced. This defect I have overcome by arranging at the point of impact a reinforced ortrussed section which is nelatively rigid and initiates the vibratory movement at a point further from the center.

7 upon motor vehicles, and in which the switch -mprovenient applies to sound pro- It is another feature of the invention to obtain a construction which may be used across the casing adjacent to the forward end thereof.

Dis a reciprocatory striker for impinging upon the diaphragm C, E is an electro-magnet, and F is a vibratory armature actuated thereby and which is connected with the striker D. To avoid injury to. the diaphragm at the point of impact, a reinforced or trussed section is provided, this being preferably formed by embossing the center of the diaphragm, as shown at G. This will stiffen the structure sothat the blow of the striker will produce an opposite movement of this portion, initiating the flexing of the diaphragm at a point removed fromthe center. The result is that the metal is not over-strained and checking is thereby avoided. Y

The armature F is hinged to a cross bar H of the frame, which is apertured for the passage of the striker D. The striker is also further guided by a tubular support I arranged between the coils of the magnet, this being of the horseshoe type. I

' J; is a spring arm which engages a. shoulder K on the striker and holds the same in contact with the armature F and presses the latter toward the resilient bufier L.

M is a spring contact member which cooperates with a contact point N on a metallic arm 0 toclose the electric circuit, while cycle is preferably mounted upon the handle-baror in some other convenient loca tion where the push-button B may be'easily 1 reached. Asshowman arm T is riveted orotherwise secured to the-casing A and is provided with a clip plate U which may be ,clamped'by bolts V upon the handle-bar.

Vt'hat T claim"as my invention is "The'combination with a casing, ofelectro- Jinagnetically operated sound producing having an means inclosed therein including a diaphragm and a striker, a horn extending forward from said casing and arranged. centrally of the diaphragm, said diaphragm inwardly embossed portion against which the striker impinges, said in* Wardly embossed portion being substantially in axial alinement with the horn, a pushbutton projecting from said casing on the op- 

